diff --git a/history.txt b/history.txt
index c5656124..8c981fd5 100755
--- a/history.txt
+++ b/history.txt
@@ -3160,3 +3160,7 @@ http://snap.berkeley.edu/run#cloud:Username=jens&ProjectName=rotation
 * Morphic, Blocks, GUI: Filter Project Names in the “open” dialog, thanks, Bernat!!
 * GUI: update scrollbars of the project dialog as the project list is filtered
 * Blocks: fixed #1522
+
+161205
+------
+* Objects: fixed #1543
diff --git a/objects.js b/objects.js
index f1bc80ed..edb3f878 100644
--- a/objects.js
+++ b/objects.js
@@ -82,7 +82,7 @@ SpeechBubbleMorph, RingMorph, isNil, FileReader, TableDialogMorph,
 BlockEditorMorph, BlockDialogMorph, PrototypeHatBlockMorph, localize,
 TableMorph, TableFrameMorph, normalizeCanvas, BooleanSlotMorph*/
 
-modules.objects = '2016-November-28';
+modules.objects = '2016-December-05';
 
 var SpriteMorph;
 var StageMorph;
@@ -7300,7 +7300,7 @@ Note.prototype.setupContext = function () {
             window.msAudioContext ||
             window.oAudioContext ||
             window.webkitAudioContext;
-        if (!ctx.prototype.hasOwnProperty('createGain')) {
+        if (!ctx.prototype.createGain) {
             ctx.prototype.createGain = ctx.prototype.createGainNode;
         }
         return ctx;